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MANUALS (5)
Product Highlights
Description
The PC700-2 is a microprocessor-based control designed to regulate the supply water temperature of a single boiler, based on the outdoor temperature. A wiring harness is provided to be easily connected to the Taco Expandable (-EXP) Controls.
The PC700-2 includes functions such as automatic reset ratio calculation, Warm Weather Shut Down (WWSD), Minimum Boiler setting, and an optional automatic boiler differential. The control has a digital, liquid crystal display (LCD) that normally displays the boiler supply temperature, but can display other temperatures and settings.
Specs
| Application: | Boiler Reset |
|---|---|
| Power Supply: | 24 VAC 3VA (Powered by EXP Control) |
| Sensor Type: | 1 Outdoor Air and 1 Supply Water |
| Boiler Start: | 35 to 150°F |
| Width: | 2-7/8" |
| Outdoor Start: | 35 to 85°F |
| Height: | 4-3/4" |
| Boiler Design Temp: | 70 to 220°F |
| Outdoor Design Temp: | -60 to 32°F |
| Boiler Min. Control Temp: | Off, 80 to 180°F |
| Differential: | Auto, 2° to 42°F |
| Warm Weather Shutoff Temp: | Off, 35 F to 100 F |
| Amperage: | 5 |
| Power Method: | 24V |
| Depth (Inches): | 7/8" |
| Voltage: | 24V |
| Ambient Conditions: | Indoor use Only: 32°-105°F < 90% RH non-condensing |
| Relays: | 120 V (ac) 5 A 1/6 hp pilot duty 240 VA |
Questions?
Product Reviews
The best outdoor reset
Just fantastic!
Worth the investment
always getting an open circuit
WIsh it had fire delay
Product Q&A
3 QuestionsQ: I have a ZVC406-4 (not EXP). Would like to use with a PC700-2. Is this possible? I see what looks like a power port in the ZVC406-4, but it is covered with a clear plastic cover.
Asked by John 13 years ago
Add your answer
You need the EXP switching relay, the switching relay you have does not work with the outdoor reset control. There is a molex connector in the EXP switching relay that the outdoor reset connects to. Good luck...
Q: Is this Compatible with the TACO SR 504 EXP
Asked by homeowner 14 years ago
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TACO SR 504 EXP is compatible with the Taco Boiler Reset Control.
Yes, the PC700-2 is compatible with the SR 504 EXP. I have had a PC700-2 connected to a SR 506 EXP for nearly 3 years. Both units have been trouble free. I had to experiment with the settings on the PC700-2 to find the best balance for my installation.
Yes it is, there it a wiring harness included that plugs in to the the upper left of the Taco SR control. You then need to run 2 wire thermostat wire from the PC 700 to a supply sensor. Make sure it's installed on the top of the main supply pipe about 10 inches down stream of a turn, you want it on a straight section of pipe to get an accurate reading. Make sure you put a piece of pipe insulation around the sensors and pipe as well. The outdoor sensor is also 2 wire thermostat wire. Try to install it on the north face of your home and at least one foot of grade for snow drifts. Great control and easy to install, good luck.
The answer is Yes!!! I checked my wiring diagrams and they show the 700-2 connects to all the Taco EXP series relays. There is an interface connector on the EXP board that receives the 700-2 reset controller. Tessier Electric Inc.
Q: Can I overide the pc 700? Situations are often when I need hottern water in baseboard to heat up faster and also to kick on the kick space under the sink.
Asked by bill 16 years ago
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Verified Reply- PexSupply StaffNo, you can't override it, but you can change the settings on the control. This will boost the water temperature supplying the baseboard and in turn will provide quicker response time for your system.